I just found out that we have a special WordPress Blog Search Engine that will allow us to target just WordPress blogs in our searches. It was created by the Good Folks at Feedster and can be found here.
It is still in Beta and you may have to add your RSS Feed to it like I did but it is a mostly painless process of creating a Feedster account, if you do not already have one, and adding your feed to Feedster.
The next step is to add the following code that you receive from feedster after claiming your feed, to a blog post
Then you go back to the feedster page and click the Claim My Feed Now button.
After that enter in a search like this one and you are off to the races!